US11095408B2 - Generating reference signal(s) using Zadoff-Chu sequence(s) - Google Patents

Generating reference signal(s) using Zadoff-Chu sequence(s) Download PDF

Info

Publication number
US11095408B2
US11095408B2 US16/460,201 US201916460201A US11095408B2 US 11095408 B2 US11095408 B2 US 11095408B2 US 201916460201 A US201916460201 A US 201916460201A US 11095408 B2 US11095408 B2 US 11095408B2
Authority
US
United States
Prior art keywords
reference signal
sequence
frequency domain
zadoff
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
US16/460,201
Other languages
English (en)
Other versions
US20190327053A1 (en
Inventor
Yuanzhou HU
Mengying Ding
Zongjie Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of US20190327053A1 publication Critical patent/US20190327053A1/en
Assigned to HUAWEI TECHNOLOGIES CO., LTD. reassignment HUAWEI TECHNOLOGIES CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WANG, ZONGJIE, DING, Mengying, HU, Yuanzhou
Application granted granted Critical
Publication of US11095408B2 publication Critical patent/US11095408B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0055—ZCZ [zero correlation zone]
    • H04J13/0059—CAZAC [constant-amplitude and zero auto-correlation]
    • H04J13/0062—Zadoff-Chu
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0074—Code shifting or hopping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • This application relates to the communications field, and in particular, to a reference signal transmission method and an apparatus in a wireless communications system.
  • a reference signal also referred to as a pilot signal
  • a reference signal is a predefined signal sent by a sending device to a receiving device on a predefined resource.
  • the receiving device may obtain channel-related information based on the received reference signal, to complete channel estimation or channel measurement.
  • a channel measurement result may be used for resource scheduling and link adaptation, and a channel estimation result may be used by the receiving device to demodulate data.
  • different reference signals usually need to be orthogonal. Usually a plurality of mutually orthogonal reference signals may be provided in a time division manner, a frequency division manner, a code division manner, or the like.
  • an uplink reference signal includes an uplink demodulation reference signal (DMRS) and an uplink sounding reference signal (SRS); and a downlink reference signal includes a cell-specific reference signal (CRS), a downlink DMRS, a channel state information-reference signal (CSI-RS), a multimedia broadcast multicast service single frequency network reference signal (MBSFN RS), and a positioning reference signal (PRS).
  • DMRS uplink demodulation reference signal
  • SRS uplink sounding reference signal
  • a downlink reference signal includes a cell-specific reference signal (CRS), a downlink DMRS, a channel state information-reference signal (CSI-RS), a multimedia broadcast multicast service single frequency network reference signal (MBSFN RS), and a positioning reference signal (PRS).
  • CRS cell-specific reference signal
  • CSI-RS channel state information-reference signal
  • MMSFN RS multimedia broadcast multicast service single frequency network reference signal
  • PRS positioning reference signal
  • each reference signal sequence with a fixed length 30 or 60 signal sequences are defined in consideration of a network deployment requirement. Because of some of the signal sequences, when a transmit power of a cell-edge user is limited, accuracy of measurement of the channel-related information by the receiving device is reduced, and data transmission performance deteriorates.
  • This application provides a reference signal sequence generation method, a reference signal transmission method and an apparatus, to improve data transmission performance.
  • a reference signal sequence generation method includes: determining a reference signal sequence based on a Zadoff-Chu (ZC) sequence, where a length value of the ZC sequence is selected from at least two length values.
  • the reference signal sequence may be generated by a module of a sending device, or may be generated by a module of a receiving device.
  • one ZC sequence is selected from at least two ZC sequences with different lengths to generate the reference signal sequence, so that the generated reference signal sequence is characterized by a low peak-to-average ratio (PAPR) and a low raw cubic metric (RCM).
  • PAPR peak-to-average ratio
  • RCM low raw cubic metric
  • the ZC sequence is X q (m), and X q (m) is determined according to
  • X q ⁇ ( m ) e - j ⁇ ⁇ ⁇ q ⁇ m ⁇ ( m + 1 ) M k , where m represents a sequence number of an element of the ZC sequence, m is an integer and 0 ⁇ m ⁇ M k ⁇ 1, M k represents the length value of the ZC sequence, k is an integer and 0 ⁇ k ⁇ K ⁇ 1, K represents a quantity of length values of the ZC sequence, K is an integer greater than 1, q represents a value of a root of the ZC sequence, and q and M k are relatively prime.
  • the value of the root of the ZC sequence is determined by using the foregoing method, and the ZC sequence may be further generated by using M k and q. Further, the ZC sequence is used to generate the reference signal sequence, and the reference signal is correspondingly generated. The generated reference signal is characterized by a low PAPR/RCM. The reference signal is used for data transmission, thereby improving data transmission performance.
  • a length of the reference signal sequence is 48
  • a value of M k and the value of q of the ZC sequence are one type in a parameter value set
  • M k in the parameter value set has at least two different values
  • the parameter value set includes at least two items of the following:
  • the sending device selects a group of values from the set of the value of M k and the value of q to generate the reference signal sequence.
  • a quantity of reference signal sequences that meet a PAPR/RCM requirement can be further increased through linear phase rotation.
  • a reference signal transmission method includes: converting, by a sending device, a frequency domain reference signal from frequency domain to time domain, to generate a time domain reference signal, where the frequency domain reference signal includes a reference signal sequence mapped to a frequency domain resource, the reference signal sequence is determined based on a ZC sequence, and a length value of the ZC sequence is selected from at least two length values; and sending, by the sending device, the time domain reference signal.
  • the sending device generates the reference signal sequence by using the method according to any one of the first aspect or the possible embodiments of the first aspect.
  • one ZC sequence is selected from at least two ZC sequences with different lengths to generate the reference signal sequence.
  • a reference signal is further generated, so that the generated reference signal is characterized by a low peak-to-average ratio (PAPR) and a low raw cubic metric (RCM), thereby improving data transmission performance.
  • PAPR peak-to-average ratio
  • RCM low raw cubic metric
  • the frequency domain resource includes a first frequency domain resource group and a second frequency domain resource group, and the second frequency domain resource group and the first frequency domain resource group include a same quantity of basic time-frequency resource units and have no overlapping basic time-frequency resource unit;
  • the reference signal sequence includes a first reference signal sequence and a second reference signal sequence; and the first reference signal sequence is mapped to the first frequency domain resource group, and the second reference signal sequence is mapped to the second frequency domain resource group.
  • the method in this implementation is applied, so that a PAPR/RCM of a block reference signal can be reduced, thereby improving data transmission efficiency.
  • a reference signal transmission method includes: receiving, by a receiving device, a time domain reference signal; and converting, by the receiving device, the time domain reference signal from time domain to frequency domain, to generate a frequency domain reference signal, where the frequency domain reference signal includes a reference signal sequence mapped to a frequency domain resource, the reference signal sequence is determined based on a ZC sequence, and a length value of the ZC sequence is selected from at least two length values.
  • the receiving device generates the reference signal sequence by using the method according to any one of the first aspect or the embodiments of the first aspect.
  • the frequency domain resource includes a first frequency domain resource group and a second frequency domain resource group, and the second frequency domain resource group and the first frequency domain resource group include a same quantity of basic time-frequency resource units and have no overlapping basic time-frequency resource unit;
  • the reference signal sequence includes a first reference signal sequence and a second reference signal sequence; and the first reference signal sequence is mapped to the first frequency domain resource group, and the second reference signal sequence is mapped to the second frequency domain resource group.
  • a device includes modules that perform the method according to any one of the first aspect or the embodiments of the first aspect.
  • a communications apparatus includes a processing unit and a sending unit, to perform the method according to any one of the second aspect or the embodiments of the second aspect.
  • a communications apparatus includes a processor, a memory, and a transceiver, to perform the method according to any one of the second aspect or the embodiments of the second aspect.
  • a communications apparatus includes a processing unit and a sending unit, to perform the method according to any one of the third aspect or the embodiments of the third aspect.
  • a communications apparatus includes a processor, a memory, and a transceiver, to perform the method according to any one of the third aspect or the embodiments of the third aspect.
  • a computer readable storage medium stores an instruction, and when the instruction runs on a computer, the computer performs the method according to any one of the first aspect or the embodiments of the first aspect.
  • a computer readable storage medium stores an instruction, and when the instruction runs on a computer, the computer performs the method according to any one of the second aspect or the embodiments of the second aspect.
  • a computer readable storage medium stores an instruction, and when the instruction runs on a computer, the computer performs the method according to any one of the third aspect or the embodiments of the third aspect.
  • a computer program product including an instruction is provided.
  • the computer program product runs on a computer, the computer performs the method according to any one of the first aspect or the embodiments of the first aspect.
  • a computer program product including an instruction is provided.
  • the computer program product runs on a computer, the computer performs the method according to any one of the second aspect or the embodiments of the second aspect.
  • a computer program product including an instruction is provided.
  • the computer program product runs on a computer, the computer performs the method according to any one of the third aspect or the embodiments of the third aspect.
  • FIG. 1 is an architectural diagram of a communications system to which embodiments of this application are applied;
  • FIG. 2 is a diagram of generating a reference signal sequence by cyclically extending or truncating a ZC sequence according to an embodiment of this application;
  • FIG. 3 is a block diagram of block reference signal transmission according to an embodiment of this application.
  • FIG. 4 is a flow chart of a reference signal transmission method applied to a sending device according to an embodiment of this application;
  • FIG. 5 is a flow chart of a reference signal transmission method applied to a receiving device according to an embodiment of this application;
  • FIG. 6 is a block diagram of a communications apparatus according to an embodiment of this application.
  • FIG. 7 is a block diagram of another communications apparatus according to an embodiment of this application.
  • FIG. 8 is a block diagram of another communications apparatus according to an embodiment of this application.
  • FIG. 9 is a block diagram of another communications apparatus according to an embodiment of this application.
  • a sending device and a receiving device in the embodiments of this application may be any transmit end device and any receive end device that transmit data in a wireless manner.
  • the sending device and the receiving device may be any devices having a wireless receiving and sending function, including but not limited to: a NodeB, an evolved NodeB, a base station in a 5th Generation (5G) communications system, a base station or a network device in a future communications system, an access node in a Wi-Fi system, a wireless relay node, a wireless backhaul node, and user equipment (UE).
  • the UE may also be referred to as a terminal, a mobile station (MS), a mobile terminal (MT), or the like.
  • the UE may communicate with one or more core networks over a radio access network (RAN), or may access a distributed network in a self-organizing or grant-free manner.
  • RAN radio access network
  • the UE may access a wireless network in another manner for communication, or the UE may directly perform wireless communication with another UE. This is not limited in the embodiments of this application.
  • the sending device and the receiving device in the embodiments of this application may be deployed on land such as indoor or outdoor devices, handheld devices, or in-vehicle devices, or may be deployed on the water, or may be deployed on an airplane, a balloon, or a satellite in the sky.
  • the UE in the embodiments of this application may be a mobile phone, a tablet computer (Pad), a computer having a wireless receiving and sending function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving vehicles, a wireless terminal in telemedicine (e.g., remote medical), a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, or the like.
  • An application scenario is not limited in the embodiments of this application.
  • FIG. 1 is an architectural diagram of a communications system to which embodiments of this application are applied.
  • the communications system includes a core network device 110 , a base station 120 , UE 130 , and UE 140 that are connected in a wireless manner, a wired manner, or another manner.
  • the UE 130 and the UE 140 may be still or may be mobile.
  • FIG. 1 is only an architectural diagram, and the communications system may further include one or more other network devices and/or terminal devices, which are not shown in FIG. 1 .
  • the embodiments of this application may be applied to downlink data transmission, may be applied to uplink data transmission, or may be applied to device-to-device (D2D) data transmission.
  • a sending device is a base station, and a corresponding receiving device is UE.
  • a sending device is UE, and a corresponding receiving device is a base station.
  • a sending device is UE, and a corresponding receiving device is also UE. This is not limited in the embodiments of this application.
  • NR New Radio
  • 5G 5th Generation
  • a block reference signal method is proposed for a scenario in which a plurality of UEs or a plurality of transmit ports share a same or partially same time-frequency resource, to improve orthogonality between reference signals of different UEs or different transmit ports.
  • a reference signal of each UE is divided into a plurality of blocks, and it is ensured that reference signals of different UEs are orthogonal within blocks, to ensure that the overall reference signals of the different UEs are orthogonal.
  • time-frequency resources of two UEs may be shared by using a block size as a basic unit, and the time-frequency resources of the two UEs in spatial multiplexing do not need to completely overlap. Therefore, allocation of resources between UEs is more flexible.
  • a peak-to-average ratio (PAPR) and a raw cubic metric (RCM) of a reference signal may become larger due to introduction of the block reference signal method.
  • PAPR peak-to-average ratio
  • RCM raw cubic metric
  • a frequency domain filter e.g., spectrum shaping
  • DFT-S-OFDM discrete Fourier transform spread orthogonal frequency division multiplexing
  • the PAPR of the data signal may be lower than a PAPR of a reference signal, so that when a transmit power of a cell-edge user is limited, accuracy of measuring channel-related information by the receiving device is reduced, and data transmission performance is reduced.
  • An embodiment of this application provides a reference signal sequence generation method.
  • a reference signal sequence generated by using the method is applied to a communications system, a problem that a reference signal has a high PAPR is resolved, and data transmission performance can be further improved.
  • the reference signal sequence may be generated by a module of a sending device, or may be generated by a module of a receiving device.
  • the reference signal sequence is determined based on a ZC sequence, and a length value of the ZC sequence is selected from at least two length values.
  • the ZC sequence X q (m) is determined according to a formula (1):
  • m represents a sequence number of an element of the ZC sequence
  • m is an integer and 0 ⁇ m ⁇ M k ⁇ 1
  • M k represents the length value of the ZC sequence
  • M k may or may not be a prime number
  • k is an integer and 0 ⁇ k ⁇ K ⁇ 1
  • K represents a quantity of length values of the ZC sequence
  • K is an integer greater than 1
  • q represents a value of a root of the ZC sequence
  • q and M k are relatively prime.
  • a sequence number of an array or a sequence may have different numbering schemes, and counting may start from 1 or 0. This is not limited in this embodiment of this application.
  • the ZC sequence determined based on q may also be referred to as a q th root ZC sequence whose length is M k .
  • the ZC sequence has a good autocorrelation. In other words, the sequence has a large autocorrelation peak.
  • the ZC sequence determined according to the formula (1) is essentially a sequence in a ZC sequence set.
  • the ZC sequence set includes at least two ZC sequences, and the length value M k of the ZC sequence in the sequence set has at least two different values.
  • n is an integer and 0 ⁇ n ⁇ N ⁇ 1
  • N represents a length of the base sequence
  • N is an integer greater than 1.
  • the formula (2) may indicate that a reference signal sequence whose length is N is obtained by cyclically extending the ZC sequence whose length is M k .
  • the formula (2) may indicate that a reference signal sequence whose length is N is obtained by truncating the ZC sequence whose length is M k .
  • different linear phase rotation may be performed on the base sequence R q (n) in the frequency domain.
  • Different reference signal sequences obtained after different linear phase rotation is performed on a same base sequence are completely orthogonal to each other. Therefore, there is no interference between the reference signal sequences obtained through linear phase rotation.
  • ⁇ represents a phase of linear phase rotation
  • ⁇ is a real number.
  • ⁇ (c ⁇ )/6
  • a value of c may range from 0 to 11. Therefore, 12 different mutually-orthogonal reference signal sequences may be obtained by performing different phase rotation on a base reference signal sequence.
  • Linear phase rotation in the frequency domain is equivalent to cyclic shift (cyclic shift) in the time domain.
  • the ZC sequence can be uniquely determined by using a value of the parameter M k and a value of q.
  • a ZC sequence that meets a low PAPR/RCM requirement may be obtained in two embodiments.
  • a combination of the value of M k and the value of q is given by using a table or a parameter value set.
  • the value of M k is given, and the value of q is obtained through calculation by using a formula.
  • a length of each block is four resource blocks (RB) or 48 subcarriers, and 30 roots are required, assuming that a constraint condition is that an RCM of a reference signal sequence is less than 2.5 and that a maximum cross-correlation amplitude value is less than 0.35, M k and q that meet the constraint condition are shown in Table 1.
  • Sequence numbers in Table 1 to Table 3 are only examples of sequence numbers of combinations of the value of M k and the value of q, and do not limit other sequences of the combinations of the value of M k and the value of q.
  • the value of M k and the value of q of the ZC sequence in this embodiment of this application are one type in a parameter value set
  • M k in the parameter value set has at least two different values
  • the parameter value set includes at least two items of the following:
  • q may be represented as follows in formula (5):
  • a larger value of Q usually indicates a higher PAPR/RCM of a reference signal sequence generated based on the determined q.
  • Root ZC sequences with a same length have a very good cross-correlation property (e.g., cross-correlation values are small).
  • a limited quantity of root ZC sequences that meet the low PAPR/RCM requirement are determined from the ZC sequences with one length. More root ZC sequences can be found by determining the root ZC sequence that meets the low PAPR/RCM requirement from the ZC sequences with a plurality of lengths.
  • root ZC sequences with different lengths have a relatively poor cross-correlation property (e.g., cross-correlation values are large). Determining the root ZC sequence that meets the low PAPR/RCM requirement from the ZC sequences with a plurality of lengths may be applied to a scenario in which there is a low requirement for a cross-correlation of a reference signal. For example, different reference signals do not overlap in frequency domain.
  • the foregoing method embodiment provides a reference signal sequence generation method.
  • the reference signal sequence generated by using the method is characterized by a low PAPR/RCM.
  • the reference signal sequence is applied to the communications system, data transmission performance can be improved.
  • An embodiment of this application further provides a reference signal transmission method, as shown in FIG. 4 .
  • a sending device converts a frequency domain reference signal from frequency domain to time domain, to generate a time domain reference signal, where the frequency domain reference signal includes a reference signal sequence mapped to a frequency domain resource, the reference signal sequence is determined based on a ZC sequence, and a length value of the ZC sequence is selected from at least two length values.
  • the reference signal sequence is generated by using the foregoing method. Details are not described herein again.
  • the sending device may further obtain the reference signal sequence before mapping the reference signal sequence to the frequency domain resource to generate the frequency domain reference signal.
  • the sending device may be obtaining a generated reference signal sequence from a memory, or may be generating a reference signal sequence in real time according to a formula.
  • the frequency domain resource includes a first frequency domain resource group and a second frequency domain resource group, and the second frequency domain resource group and the first frequency domain resource group include a same quantity of basic time-frequency resource units and have no overlapping basic time-frequency resource unit.
  • the reference signal sequence includes a first reference signal sequence and a second reference signal sequence. The first reference signal sequence is mapped to the first frequency domain resource group, and the second reference signal sequence is mapped to the second frequency domain resource group.
  • the basic time-frequency resource unit may have different definitions in different systems.
  • the basic time-frequency resource unit in an LTE system is a resource element (resource element, RE).
  • the first frequency domain resource group and the second frequency domain resource group may be any two of a frequency domain resource group 0 to a frequency domain resource group G ⁇ 1 in FIG. 3 , where G is an integer greater than 1.
  • G reference signal sequences are mapped to G frequency domain resource groups respectively, to generate a frequency domain reference signal, and the frequency domain reference signal is converted from frequency domain to time domain, to generate a time domain reference signal.
  • a common method for conversion from frequency domain to time domain is inverse discrete Fourier transform (IDFT) and inverse fast Fourier transform (IFFT).
  • IDFT inverse discrete Fourier transform
  • IFFT inverse fast Fourier transform
  • Operation S 420 The sending device sends the time domain reference signal.
  • the sending device may further perform processing such as digital-to-analog conversion (converting a digital signal into an analog signal) and carrier modulation (modulating a baseband signal to a radio frequency carrier), and then transmit the time domain reference signal by using an antenna.
  • processing such as digital-to-analog conversion (converting a digital signal into an analog signal) and carrier modulation (modulating a baseband signal to a radio frequency carrier), and then transmit the time domain reference signal by using an antenna.
  • An embodiment of this application further provides another reference signal transmission method, as shown in FIG. 5 .
  • Operation S 510 A receiving device receives a time domain reference signal.
  • the receiving device receives a radio signal from a radio channel by using an antenna, and the radio signal includes the time domain reference signal.
  • Operation S 520 The receiving device converts the time domain reference signal from time domain to frequency domain, to generate a frequency domain reference signal, where the frequency domain reference signal includes a reference signal sequence mapped to a frequency domain resource, the reference signal sequence is determined based on a ZC sequence, and a length value of the ZC sequence is selected from at least two length values.
  • the reference signal sequence is generated by using the foregoing method. Details are not described herein again.
  • a common method for conversion from time domain to frequency domain is discrete Fourier transform (IDFT) and fast Fourier transform (IFFT).
  • IDFT discrete Fourier transform
  • IFFT fast Fourier transform
  • embodiments of this application are not limited to these methods.
  • the receiving device may perform measurement based on the frequency domain reference signal or a time domain reference signal.
  • the measurement herein may include: estimating a parameter of a radio channel between a sending device and the receiving device, where a parameter estimation result of the radio channel may be used to demodulate data sent by the sending device; measuring quality of the channel between the sending device and the receiving device, where a quality measurement result of the channel may be used for link adaptation and resource allocation of data transmission between the sending device and the receiving device; and measuring a signal propagation time or a propagation time difference between the sending device and the receiving device, where a measurement result of the propagation time or the propagation time difference may be used to determine a geographical location of the sending device or a geographical location of the receiving device.
  • An application and a type of the reference signal are not limited in this application.
  • the sending device may select one ZC sequence from ZC sequences that meet a PAPR/RCM requirement, and the selected ZC sequence is used to generate the reference signal sequence.
  • a method for obtaining the ZC sequence by the sending device may be obtaining a generated ZC sequence from a memory, or may be generating a ZC sequence in real time based on a related parameter of the ZC sequence.
  • the sending device may select one group of related parameters of the ZC sequence or one related parameter of the ZC sequence from a related parameter set of the ZC sequence, to generate the ZC sequence and further generate the reference signal sequence based on the ZC sequence.
  • a method for obtaining the related parameter of the ZC sequence by the sending device may be obtaining the related parameter from the memory.
  • a network device uniformly allocates the ZC sequence and then sends the related parameter of the ZC sequence to the sending device by using signaling.
  • the sending device generates the ZC sequence by using the related parameter of the ZC sequence, to further generate the reference signal sequence.
  • the related parameter of the ZC sequence herein may be a related parameter used to indicate M k and q, for example, a root sequence number indication q idx , the length value M k of the ZC sequence, and a value q of a root of the ZC sequence.
  • the network device herein may be an NodeB, an evolved NodeB (eNodeB), a base station in a 5G communications system, or another network device.
  • a method for obtaining the reference signal sequence by the receiving device may be first obtaining a related parameter of the ZC sequence used to generate the reference signal sequence, and then generating the ZC sequence by using the parameter, to further generate the reference signal sequence.
  • a method for obtaining the related parameter of the ZC sequence by the receiving device may be as follows: After obtaining the ZC sequence used for the reference signal sequence, the sending device may send the related parameter of the ZC sequence to the receiving device by using signaling; or the network device may send the related parameter of the ZC sequence to the receiving device by using signaling.
  • the sending device and the receiving device may further obtain the related parameter of the ZC sequence in an implicit manner, for example, by implicitly determining the related parameter of the ZC sequence by using a cell identifier and a time-slot number, or the like.
  • the sending device and the receiving device may store a correspondence between a value of a root sequence number indication q idx and a value of a root q by using a table, or the sending device and the receiving device may calculate a correspondence between a value of a root sequence number indication q idx and a value q of a root based on M k .
  • a method for determining the correspondence between a value of a root sequence number indication q idx and a value of a root q by the sending device and the receiving device based on M 0 is shown below by using M 0 as an example.
  • the method is described in a form of pseudocode as follows:
  • N q indicates a required quantity of roots. For example, when there are four RBs, 30 roots are required.
  • a quantity of roots determined by using the foregoing loop may be less than a required quantity N q .
  • some of remaining root sequence numbers may be selected in ascending order or in descending order as a supplement.
  • the value q of the root corresponding to the root sequence number indication q idx determined by using the foregoing loop is shown in Table 4.
  • Table 4 for reference signal sequences each with a length of 40 RBs and that are determined based on 30 roots, PAPRs are less than 3.4 dB and RCMs are less than 1.9 dB.
  • the reference signal sequences may be used as a reference signal of a waveform with a low PAPR.
  • each device such as the sending device or the receiving device includes a corresponding hardware structure and/or a corresponding software module for performing each function.
  • each device such as the sending device or the receiving device includes a corresponding hardware structure and/or a corresponding software module for performing each function.
  • units and method operations may be implemented by hardware or a combination of hardware and computer software in this application. Whether a function is performed by hardware or hardware driven by computer software depends on particular applications and design constraints of the technical solutions. A person skilled in the art may use different methods to implement the described functions for each particular application, but these implementations should be understood as falling within the scope of this application.
  • FIG. 6 and FIG. 7 are block diagrams of two possible communications apparatuses according to embodiments of this application.
  • the communications apparatus implements a function of a sending device in the foregoing reference signal transmission method embodiment, and therefore, a beneficial effect of the foregoing reference signal transmission method can also be implemented.
  • the communications apparatus may be the UE 130 , the UE 140 , or the base station 120 shown in FIG. 1 , or may be another transmit side device that performs wireless communication by using a reference signal.
  • a communications apparatus 600 includes a processing unit 610 and a sending unit 620 .
  • the processing unit 610 is configured to convert a frequency domain reference signal from frequency domain to time domain, to generate a time domain reference signal, where the frequency domain reference signal includes a reference signal sequence mapped to a frequency domain resource, the reference signal sequence is determined based on a ZC sequence, and a length value of the ZC sequence is selected from at least two length values.
  • the sending unit 620 is configured to send the time domain reference signal.
  • a communications apparatus 700 includes a processor 710 , a transceiver 720 , and a memory 730 .
  • the memory 730 may be configured to store code executed by the processor 710 .
  • Components in the communications apparatus 700 communicate with each other by using an internal connection path. For example, the components transmit a control and/or data signal by using a bus.
  • the processor 710 is configured to convert a frequency domain reference signal from frequency domain to time domain, to generate a time domain reference signal, where the frequency domain reference signal includes a reference signal sequence mapped to a frequency domain resource, the reference signal sequence is determined based on a ZC sequence, and a length value of the ZC sequence is selected from at least two length values.
  • the transceiver 720 is configured to send the time domain reference signal.
  • processing unit 610 the processor 710 , the sending unit 620 , and the transceiver 720 , refer to the foregoing method embodiment. Details are not described herein again.
  • FIG. 8 and FIG. 9 are block diagrams of two other possible communications apparatuses according to embodiments of this application.
  • the communications apparatus implements a function of a receiving device in the foregoing reference signal transmission method embodiment, and therefore, a beneficial effect of the foregoing reference signal transmission method can also be implemented.
  • the communications apparatus may be the UE 130 , the UE 140 , or the base station 120 shown in FIG. 1 , or may be another receive side device that performs wireless communication by using a reference signal.
  • a communications apparatus 800 includes a receiving unit 810 and a processing unit 820 .
  • the receiving unit 810 is configured to receive a time domain reference signal.
  • the processing unit 820 is configured to convert the time domain reference signal from time domain to frequency domain, to generate a frequency domain reference signal, where the frequency domain reference signal includes a reference signal sequence mapped to a frequency domain resource, the reference signal sequence is determined based on a ZC sequence, and a length value of the ZC sequence is selected from at least two length values.
  • a communications apparatus 900 includes a processor 910 , a transceiver 920 , and a memory 930 .
  • the memory 930 may be configured to store code executed by the processor 910 .
  • Components in the communications apparatus 900 communicate with each other by using an internal connection path. For example, the components transmit a control and/or data signal by using a bus.
  • the transceiver 920 is configured to receive a time domain reference signal.
  • the processor 910 is configured to convert the time domain reference signal from time domain to frequency domain, to generate a frequency domain reference signal, where the frequency domain reference signal includes a reference signal sequence mapped to a frequency domain resource, the reference signal sequence is determined based on a ZC sequence, and a length value of the ZC sequence is selected from at least two length values.
  • FIG. 7 and FIG. 9 show only designs of the communications apparatus.
  • the communications apparatus may include any quantity of transceivers, processors, memories, and the like. All communications apparatuses that can implement this application fall within the protection scope of this application.
  • the receiving unit 810 the transceiver 920 , the processing unit 820 , and the processor 910 , refer to the foregoing method embodiment. Details are not described herein again.
  • the processor in the embodiments of this application may be a central processing unit (CPU), or may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or another programmable logic device, a transistor logic device, a hardware component, or any combination thereof.
  • the general-purpose processor may be a microprocessor, or may be any conventional processor.
  • the method steps in the embodiments of this application may be implemented by hardware or may be implemented by executing a software instruction by a processor.
  • the software instruction may include a corresponding software module.
  • the software module may be stored in a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a register, a hard disk, a removable hard disk, a CD-ROM, or any other form of storage medium well-known in the art.
  • a storage medium is coupled to a processor, so that the processor can read information from the storage medium or write information into the storage medium.
  • the storage medium may be a component of the processor.
  • the processor and the storage medium may be located in the ASIC.
  • the ASIC may be located in a sending device or a receiving device.
  • the processor and the storage medium may exist in the sending device or receiving device as discrete components.
  • All or some of the foregoing embodiments may be implemented by using software, hardware, firmware, or any combination thereof.
  • all or some of the embodiments may be implemented in a form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a dedicated computer, a computer network, or another programmable apparatus.
  • the computer instruction may be stored in a computer readable storage medium, or may be transmitted by using the computer readable storage medium.
  • the computer instruction may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired (for example, a coaxial cable, an optical fiber, or a digital subscriber line (DSL)) or wireless (for example, infrared, radio, or microwave) manner.
  • the computer readable storage medium may be any usable medium accessible by a computer, or a data storage device, such as a server or a data center, integrating one or more usable media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium (for example, a DVD), a semiconductor medium (for example, a solid state disk (SSD)), or the like.
  • sequence numbers of the foregoing processes do not mean execution sequences in the embodiments of this application.
  • the execution sequences of the processes should be determined based on functions and internal logic of the processes, and should not be construed as any limitation on the implementation processes of the embodiments of this application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
US16/460,201 2017-01-06 2019-07-02 Generating reference signal(s) using Zadoff-Chu sequence(s) Active US11095408B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201710011406.3A CN108282305B (zh) 2017-01-06 2017-01-06 参考信号的传输方法和设备
CN201710011406.3 2017-01-06
PCT/CN2018/071464 WO2018127111A1 (fr) 2017-01-06 2018-01-04 Procédé et appareil d'émission de signal de référence

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/071464 Continuation WO2018127111A1 (fr) 2017-01-06 2018-01-04 Procédé et appareil d'émission de signal de référence

Publications (2)

Publication Number Publication Date
US20190327053A1 US20190327053A1 (en) 2019-10-24
US11095408B2 true US11095408B2 (en) 2021-08-17

Family

ID=62791276

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/460,201 Active US11095408B2 (en) 2017-01-06 2019-07-02 Generating reference signal(s) using Zadoff-Chu sequence(s)

Country Status (5)

Country Link
US (1) US11095408B2 (fr)
EP (1) EP3550760B1 (fr)
KR (1) KR20190095431A (fr)
CN (1) CN108282305B (fr)
WO (1) WO2018127111A1 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108289021B (zh) * 2017-01-09 2021-10-01 华为技术有限公司 参考信号的传输方法和设备
WO2019031927A1 (fr) * 2017-08-10 2019-02-14 엘지전자 주식회사 Procédé et dispositif de transmission d'autorisation relative à une transmission de liaison latérale dans un système de communication sans fil
CN110868279B (zh) * 2018-08-27 2021-09-14 华为技术有限公司 一种信号发送、接收方法及装置
CN111147215B (zh) * 2018-11-02 2021-10-15 华为技术有限公司 无线通信方法、装置及系统
CN111277358A (zh) * 2018-12-28 2020-06-12 维沃移动通信有限公司 序列生成方法、信号接收方法及装置、终端
CN115189855B (zh) 2019-01-10 2025-02-21 华为技术有限公司 信号处理的方法和装置
US20200228299A1 (en) * 2019-01-11 2020-07-16 Mediatek Inc. Ue multiplexing for dmrs transmission
US11824637B2 (en) * 2019-05-22 2023-11-21 At&T Intellectual Property I, L.P. Generating wireless reference signals in a different domain for transmission
CN112332943B (zh) * 2019-08-01 2022-02-18 华为技术有限公司 参考信号的处理方法和装置
WO2021062872A1 (fr) * 2019-10-03 2021-04-08 华为技术有限公司 Procédé et dispositif de communication
CN111901890A (zh) * 2020-01-16 2020-11-06 中兴通讯股份有限公司 参考信号处理方法、装置、第一通信节点和第二通信节点
WO2022082792A1 (fr) * 2020-10-23 2022-04-28 华为技术有限公司 Procédé et appareil de transmission de signal et de détection de signal
CN112350816B (zh) * 2020-11-12 2023-01-17 海能达通信股份有限公司 一种数据传输方法、存储介质和通信设备
FI20215005A1 (en) 2021-01-04 2022-07-05 Nokia Technologies Oy Reference signal arrangement
KR20220101473A (ko) * 2021-01-11 2022-07-19 삼성전자주식회사 무선 통신 시스템에서 제어 채널 전송을 위한 장치 및 방법
CN115412939B (zh) * 2022-08-25 2024-09-20 比科奇微电子(杭州)有限公司 Zc序列的生成方法、装置、设备、介质和程序产品
CN119544436A (zh) * 2023-08-29 2025-02-28 华为技术有限公司 一种通信方法及装置
CN120934961A (zh) * 2024-05-11 2025-11-11 华为技术有限公司 通信方法及装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010020291A1 (fr) 2008-08-22 2010-02-25 Telefonaktiebolaget Lm Ericsson (Publ) Génération de séquence de zadoff-chu efficace
EP2194653A1 (fr) 2007-09-28 2010-06-09 Panasonic Corporation Dispositif de radiocommunication et procédé de réglage de la longueur d'une séquence
US20100284265A1 (en) 2007-12-27 2010-11-11 Panasonic Corporation Sequence number establishing method, wireless communication terminal apparatus and wireless communication base station apparatus
CN101917356A (zh) 2010-07-19 2010-12-15 中国科学院计算技术研究所 LTE系统上行参考信号q阶ZC序列的生成方法及其系统
WO2011127007A1 (fr) 2010-04-07 2011-10-13 Qualcomm Incorporated Génération efficace de séquence zadoff-chu
US8295389B2 (en) * 2006-12-19 2012-10-23 Lg Electronics Inc. Sequence generating method for efficient detection and method for transmitting and receiving signals using the same
CN102769592A (zh) 2011-05-04 2012-11-07 普天信息技术研究院有限公司 一种用于通信系统的上行参考信号的生成方法及装置
CN103873215A (zh) 2012-12-17 2014-06-18 中兴通讯股份有限公司 增强物理混合自动重传请求指示信道传输方法及装置
CN104202712A (zh) 2014-01-24 2014-12-10 中兴通讯股份有限公司 设备到设备同步信号的发送方法及装置、用户设备
US20190215209A1 (en) * 2016-12-19 2019-07-11 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method for transmitting signal, network device and terminal device

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8295389B2 (en) * 2006-12-19 2012-10-23 Lg Electronics Inc. Sequence generating method for efficient detection and method for transmitting and receiving signals using the same
EP2194653A1 (fr) 2007-09-28 2010-06-09 Panasonic Corporation Dispositif de radiocommunication et procédé de réglage de la longueur d'une séquence
US20100195637A1 (en) 2007-09-28 2010-08-05 Takashi Iwai Radio communication device and sequence length adjusting method
CN101809881A (zh) 2007-09-28 2010-08-18 松下电器产业株式会社 无线通信装置和序列长度调整方法
US20100284265A1 (en) 2007-12-27 2010-11-11 Panasonic Corporation Sequence number establishing method, wireless communication terminal apparatus and wireless communication base station apparatus
WO2010020291A1 (fr) 2008-08-22 2010-02-25 Telefonaktiebolaget Lm Ericsson (Publ) Génération de séquence de zadoff-chu efficace
WO2011127007A1 (fr) 2010-04-07 2011-10-13 Qualcomm Incorporated Génération efficace de séquence zadoff-chu
CN101917356A (zh) 2010-07-19 2010-12-15 中国科学院计算技术研究所 LTE系统上行参考信号q阶ZC序列的生成方法及其系统
CN102769592A (zh) 2011-05-04 2012-11-07 普天信息技术研究院有限公司 一种用于通信系统的上行参考信号的生成方法及装置
CN103873215A (zh) 2012-12-17 2014-06-18 中兴通讯股份有限公司 增强物理混合自动重传请求指示信道传输方法及装置
CN104202712A (zh) 2014-01-24 2014-12-10 中兴通讯股份有限公司 设备到设备同步信号的发送方法及装置、用户设备
US20170041892A1 (en) 2014-01-24 2017-02-09 Zte Corporation Method and apparatus for sending device-to-device synchronization signal, and user equipment
US10085226B2 (en) * 2014-01-24 2018-09-25 Zte Corporation Method and apparatus for sending device-to-device synchronization signal, and user equipment
US20190215209A1 (en) * 2016-12-19 2019-07-11 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method for transmitting signal, network device and terminal device

Non-Patent Citations (8)

* Cited by examiner, † Cited by third party
Title
"Timing and Frequency Synchronization for OFDM Downlink Transmissions Using Zadoff-Chu Sequences"—Malik Muhammad Usman Gul, Xiaoli Ma, Senior Member, IEEE, and Sungeun Lee (IEEE Transactions on Wireless Communications, vol. 14, No. 3, Mar. 2015) (Year: 2015). *
3GPP TS 36.211 V14.1.0 (Dec. 2016), 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and modulation(Release 14), 175 pages.
DE FIGUEIREDO FELIPE A. P; MATHILDE FABIANO S.; CARDOSO FABBRYCCIO A. C. M.; VILELA RAFAEL M.; MIRANDA JOAO PAULO: "Efficient Frequency Domain Zadoff-Chu generator with application to LTE and LTE-A systems", 2014 INTERNATIONAL TELECOMMUNICATIONS SYMPOSIUM (ITS), IEEE, 17 August 2014 (2014-08-17), pages 1 - 5, XP032677538, DOI: 10.1109/ITS.2014.6947990
Ericsson Concatenated block RS design 3GPP TSG-RAN WG1#86bis R1-1609772, Lisbon, Portugal Oct. 10-14, 2016 total 3 pages.
Ericsson,"On block RS design enabling low CM",3GPP TSG-RAN WG1#87 R1-1612344,Reno, USA Nov. 14-18, 2016,total 3 pages.
Huawei et al.,"Functionahties and design of reference signal for demodulation of UL Channels",3GPP TSG RAN WG1 Meeting #87 R1-1611246,Reno, USA, Nov. 14-18, 2016,total 5 pages.
IEEE Transactions on Wireless Communications, vol. 14, No. 3, Mar. 2015: Timing and Frequency Synchronization for OFDM Downlink Transmissions Using Zadoff-Chu Sequences—Gul et al. (Year: 2015). *
XP032677538 Felipe A. P de Figueiredo et al.,"Efficient Frequency Domain Zadoff-Chu Generator with Application to LTE and LTE-A Systems",2014 International Telecommunications Symposium (ITS),total 5 pages.

Also Published As

Publication number Publication date
EP3550760A1 (fr) 2019-10-09
EP3550760B1 (fr) 2022-03-09
WO2018127111A1 (fr) 2018-07-12
KR20190095431A (ko) 2019-08-14
CN108282305A (zh) 2018-07-13
CN108282305B (zh) 2021-09-14
EP3550760A4 (fr) 2019-12-11
US20190327053A1 (en) 2019-10-24

Similar Documents

Publication Publication Date Title
US11095408B2 (en) Generating reference signal(s) using Zadoff-Chu sequence(s)
US11018830B2 (en) Reference signal transmission method and apparatus
US11153134B2 (en) Reference signal transmission method, apparatus, and system
US20220400471A1 (en) Method for sending physical uplink shared channel and apparatus
US11139906B2 (en) Wireless communication method and wireless communications apparatus
CN110890947B (zh) 通信方法及装置
US20240372668A1 (en) Method for determining frequency-domain resource position, terminal, and storage medium
US20180076980A1 (en) Terminal device, wireless transmission method, base station device, and channel estimation method
US11165606B2 (en) Method and apparatus for sending demodulation reference signal, and demodulation method and apparatus
CN108282309B (zh) 参考信号传输方法和设备
WO2018127137A1 (fr) Procédé et appareil de transmission de signal de référence
WO2021062872A1 (fr) Procédé et dispositif de communication
CN116981060A (zh) 通信方法及装置
WO2022067798A1 (fr) Procédé et appareil de communication
CN114071720A (zh) 资源确定的方法以及通信装置
WO2020114317A1 (fr) Procédé et dispositif d'émission d'un signal de référence
WO2020155189A1 (fr) Procédés, appareils et systèmes de réception et d'émission de signal de référence
CN113383509B (zh) 通信方法、装置及系统
WO2020220475A1 (fr) Procédé et dispositif de communication
CN119729605A (zh) 一种通信方法及装置
CN119921920A (zh) 通信方法及装置
WO2024067652A1 (fr) Procédé de communication, appareil de communication, puce et support de stockage lisible par ordinateur
CN120434092A (zh) 一种通信方法及装置

Legal Events

Date Code Title Description
FEPP Fee payment procedure

Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

AS Assignment

Owner name: HUAWEI TECHNOLOGIES CO., LTD., CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HU, YUANZHOU;DING, MENGYING;WANG, ZONGJIE;SIGNING DATES FROM 20191224 TO 20200901;REEL/FRAME:053665/0696

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: FINAL REJECTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE AFTER FINAL ACTION FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: ADVISORY ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE AFTER FINAL ACTION FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: NOTICE OF ALLOWANCE MAILED -- APPLICATION RECEIVED IN OFFICE OF PUBLICATIONS

STPP Information on status: patent application and granting procedure in general

Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT RECEIVED

STPP Information on status: patent application and granting procedure in general

Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT VERIFIED

STCF Information on status: patent grant

Free format text: PATENTED CASE

CC Certificate of correction
MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4